compilation_unit {
  package_statement {
    package_name: "ExplorerTest"
  }
  is_api: true
  declarations {
    function {
      name {
        name: "Foo"
      }
      param_pattern {
      }
      return_term {
        kind: Expression
        type {
          int_type_literal {
          }
        }
      }
    }
  }
  declarations {
    function {
      name {
        name: "Main"
      }
      param_pattern {
      }
      return_term {
        kind: Expression
        type {
          int_type_literal {
          }
        }
      }
      body {
        statements {
          variable_definition {
            pattern {
              tuple_pattern {
                fields {
                  binding_pattern {
                    name: "x"
                    type {
                      expression_pattern {
                        expression {
                          int_type_literal {
                          }
                        }
                      }
                    }
                  }
                }
                fields {
                  binding_pattern {
                    name: "y"
                    type {
                      expression_pattern {
                        expression {
                          int_type_literal {
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
            is_returned: false
          }
        }
        statements {
          while_statement {
            condition {
              operator {
                op: Eq
                arguments {
                  call {
                    function {
                      identifier {
                        name: "Foo"
                      }
                    }
                    argument {
                      tuple_literal {
                      }
                    }
                  }
                }
                arguments {
                  int_literal {
                    value: 0
                  }
                }
              }
            }
            body {
              statements {
                assign {
                  lhs {
                    identifier {
                      name: "y"
                    }
                  }
                  rhs {
                    identifier {
                      name: "x"
                    }
                  }
                  op: Plain
                }
              }
            }
          }
        }
        statements {
          return_expression_statement {
            expression {
              int_literal {
                value: 1
              }
            }
          }
        }
      }
    }
  }
}
